/Engine/Plugins/Runtime/MeshModelingToolset/Source/MeshModelingTools/Public/EditMeshPolygonsTool.h
[UCLASS](Programming/UnrealArchitecture/Reference/Classes#classdeclaration)() class UPolyEditTopologyProperties : public [UEditMeshPolygonsToolActionPropertySet](API\Plugins\MeshModelingTools\UEditMeshPolygonsToolActionPrope-)
bool
bAddExtraCorners
When true, adds extra corners at sharp group edge bends (in addition to the normal corners that are placed at junctures of three or more group edges).
double
ExtraCornerAngleThresholdDegrees
When generating extra corners, how sharp the angle needs to be to warrant an extra corner placement there.